4. Adjustable temperatures from 68°F to 93°F (20°C - 34°C). A good range for most fish is 76° to 80°F (25- 27°C).

5. Water proof and explosion proof,long service life.

Important Cautions:

1. Install the suction cup on the heater according to the installation diagram in the detailed instruction.

2. Please be sure that the heater needs to be completely sunk into water, horizontal or vertical fixed in the water cycle better place, and let the working light can be seen as clear as possible.

3. Make the cable slightly droop, make sure the lower end of the cable lower than the height of the socket, to prevent the water flow into the socket through the power cable.

4. Adjust the temperature adjustment button to set the require temperature. The heater will automatically control the power on or off to the heating part according to the difference between the water temperature and the set temperature, to adjust the water temperature.

5. When using this product, slowly raise the temperature from the lower temperature to the desired temperature (for example, if the required temperature is 28℃/82℉, the temperature should be adjusted from 26℃ /78℉or less, start warming up slowly), and please pay more attention to the change of the water temperature within one week.

6. It is forbidden to pull the heater adjustment knob outwards.

Explosion Proof: 2mm thickened quartz glass,33% thicker than the normal,explosion-proof,safer for both human and animals.

An extra stick-on thermometer providing: Simple to read and easy to attach (just peel and stick), it can give you an indication for the water temperature changing.And an extra suction cup providing for spare,totally 3 suction cups included.And offer 12 months warranty.